Folks have different opinions as to what the definition of a Rat Rod is. I tend to think Rat Rods follow “Old School” rules surrounding a Hot Rod. They are built from other car parts. Many are primered. Many Hot Rods built today use custom parts. That’s not to say a Rat Rod can’t have new parts too. I think “Old School” is kind of the rule. Some folks categorize Rat Rods as not being safe. I think any car/truck can be built safe or unsafe. Some folks are proud to call their rigs “Rat Rod” others would not be caught dead in something tagged as a Rat Rod.
It’s all in the “Eye of the beholder”.
Just my $.02
Rick